code: def test_nested_list():
      A = [[1.0], 2.0, 1.5]
  
      def fun(x):
          return x[1:][0]
  
      check_grads(fun)(A)
  
file_path: autograd/tests/test_list.py
imports: import autograd.numpy
  import autograd.numpy.random
  from autograd.test_util import check_grads, check_vjp, check_jvp
  from autograd import grad
  from autograd import list, isinstance
label_desc: Use image node_id 4 for calling a global function with example usage: test_nested_list() and returns: x